GB1440256A - Oxygen-air diluter - Google Patents
Oxygen-air diluterInfo
- Publication number
- GB1440256A GB1440256A GB4374973A GB4374973A GB1440256A GB 1440256 A GB1440256 A GB 1440256A GB 4374973 A GB4374973 A GB 4374973A GB 4374973 A GB4374973 A GB 4374973A GB 1440256 A GB1440256 A GB 1440256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- valve
- pressure
- outlet
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 13
- 229910052760 oxygen Inorganic materials 0.000 abstract 13
- 239000001301 oxygen Substances 0.000 abstract 13
- 239000003570 air Substances 0.000 abstract 4
- 230000000241 respiratory effect Effects 0.000 abstract 2
- 239000012080 ambient air Substances 0.000 abstract 1
- 239000013589 supplement Substances 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S137/00—Fluid handling
- Y10S137/908—Respirator control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1842—Ambient condition change responsive
- Y10T137/1939—Atmospheric
- Y10T137/2012—Pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7764—Choked or throttled pressure type
- Y10T137/7766—Choked passage through main valve head
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7782—With manual or external control for line valve
Landscapes
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
1440256 Respiratory apparatus ROBERTSHAW CONTROLS CO 18 Sept 1973 [19 Sept 1972] 43749/73 Heading A5T An oxygen-air diluter for respiratory apparatus comprises a casing 10, ambient air inlet 14 connected by conduit 58 to outlet 16, and a chamber 34 separated into an outlet pressure sensing portion and a reference pressure sensing portion by diaphragm 38 which causes valve 26 to regulate the flow of oxygen from inlet 12 to outlet 16, the pressure in the reference pressure sensing portion being controlled by valves 72 and 86 causing such portion to be vented to atmosphere or-connected to the oxygen inlet. At a low altitude and with a manually-operable lever 88 at its dilute mode position, suction by the user at outlet 16 causes diaphragm 38 to push paddle 36 thereby opening orifice 32. Oxygen passes from the top side of the diaphragm 28 faster than it can be replenished through passage 30 and so diaphragm 28 lifts valve member 26 allowing a small amount of oxygen to pass from inlet 12 to outlet 16 to supplement air drawn through air inlet 14. When suction ceases equal oxygen pressure reestablishes itself on each side of diaphragm 28 via passage 30 and since the top side is of greater area than the bottom side, diaphragm 28 moves downwards whereby valve member 26 cuts off the oxygen flow. As the altitude increases, aneroid bellows 64 expand to progressively close valve 68 reducing the air supply and pushes rod 92 to open valve 72. Oxygen then passes faster from orifice 78 than it can be replenished through restriction 108 so that spring 100 closes valve member 86 against seat 102 and the oxygen inlet pressure presses diaphragm 38 downwards, this pressure being limited by valve 42. With increasing altitude the bellows 64 become fully expanded and 100% oxygen is supplied to the user on demand. As the altitude further increases, aneroid bellows 50 expand and contact valve 42 to restrict its opening, this causes 100% oxygen to be supplied at pressure to outlet 16. Should the oxygen inlet pressure decrease sufficiently, spring 122 acts on piston 116 to progressively close valve 114. Valve 62 exhausts excess outlet pressure. Turning lever 88 to its 100% oxygen mode position opens valve 72 causing 100% oxygen to be supplied at pressure to outlet 16.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US290426A US3875957A (en) | 1972-09-19 | 1972-09-19 | Oxygen-air diluter device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1440256A true GB1440256A (en) | 1976-06-23 |
Family
ID=23115936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4374973A Expired GB1440256A (en) | 1972-09-19 | 1973-09-18 | Oxygen-air diluter |
Country Status (2)
Country | Link |
---|---|
US (1) | US3875957A (en) |
GB (1) | GB1440256A (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4240419A (en) * | 1977-09-26 | 1980-12-23 | Normalair-Garrett (Holdings) Limited | Breathable gas delivery regulators |
US4332268A (en) * | 1979-01-16 | 1982-06-01 | Nippondenso Co., Ltd. | Atmospheric pressure compensation device |
US4274404A (en) * | 1979-04-13 | 1981-06-23 | American Safety Flight Systems, Inc. | Oxygen supply system controlled by user exhalation |
US4391290A (en) * | 1980-10-23 | 1983-07-05 | General Electric Company | Altitude sensing control apparatus for a gas turbine engine |
US4450837A (en) * | 1982-06-07 | 1984-05-29 | Kelsey W. Hatcher | Underwater breathing apparatus |
US4499914A (en) * | 1983-04-14 | 1985-02-19 | Litton Systems, Inc. | Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup |
US4648397A (en) * | 1985-10-28 | 1987-03-10 | The United States Of America As Represented By The Secretary Of The Air Force | Electronically compensated pressure dilution demand regulator |
GB2195900B (en) * | 1986-09-06 | 1991-07-24 | Peter Joseph Jackson | Pilot operated valves |
GB8724081D0 (en) * | 1987-10-14 | 1987-11-18 | Normalair Garrett Ltd | Aircraft on-board oxygen generating systems |
GB8729501D0 (en) * | 1987-12-18 | 1988-02-03 | Normalair Garrett Ltd | Aircraft aircrew life support systems |
US5372129A (en) * | 1992-06-23 | 1994-12-13 | Ryder; Steven L. | Oxygen dilution device for maintaining an essentially constant proportion of primary gas in a diluent gas |
FR2752383B1 (en) * | 1996-08-16 | 1998-11-06 | Intertechnique Sa | RESPIRATORY PROTECTION EQUIPMENT WITH INDICATION OF OPERATION |
US5743292A (en) * | 1996-10-07 | 1998-04-28 | Mcdonnell Douglas Corporation | Pressure actuated check valve |
US6380859B1 (en) | 1998-08-18 | 2002-04-30 | David W. Brownlee | Hyperbaric oxygen enrichment system for vehicles |
US6034606A (en) * | 1998-08-18 | 2000-03-07 | Brownlee; David W. | Oxygen enrichment system for wheeled vehicles cross-reference to related applications |
US6191694B1 (en) | 1998-08-18 | 2001-02-20 | David W. Brownlee | Oxygen enrichment system for vehicles |
US6866701B2 (en) * | 2002-11-26 | 2005-03-15 | Udi Meirav | Oxygen enrichment of indoor human environments |
US6726558B1 (en) | 2002-11-26 | 2004-04-27 | Udi Meirav | Oxygen enrichment of indoor human environments |
US7210479B2 (en) * | 2003-11-07 | 2007-05-01 | Van Den Akker Erik | Hyperoxic breathing system |
JP4864976B2 (en) * | 2005-10-11 | 2012-02-01 | ビーイー・インテレクチュアル・プロパティー・インコーポレイテッド | Improvement of respirator and adjuster for airplane |
EP3421099B1 (en) * | 2006-04-20 | 2019-12-11 | Zodiac Aerotechnics | Breathing apparatus for an aircrew member |
GB0614574D0 (en) * | 2006-07-22 | 2006-08-30 | Reynolds Daniel | Pressure activated device and breathing system |
US8091582B2 (en) | 2007-04-13 | 2012-01-10 | Cla-Val Co. | System and method for hydraulically managing fluid pressure downstream from a main valve between set points |
WO2008127899A2 (en) * | 2007-04-13 | 2008-10-23 | Cla-Val Co. | System and method for hydraulically managing fluid pressure downstream from a main valve |
BR112013006163C8 (en) * | 2010-09-23 | 2019-10-22 | Intertechnique Sa | oxygen regulator to deliver breathing gas to an aircraft |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1106766A (en) * | 1965-05-13 | 1968-03-20 | British Oxygen Co Ltd | Fluid flow regulators |
US3509895A (en) * | 1967-07-20 | 1970-05-05 | Bendix Corp | Oxygen regulator |
-
1972
- 1972-09-19 US US290426A patent/US3875957A/en not_active Expired - Lifetime
-
1973
- 1973-09-18 GB GB4374973A patent/GB1440256A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3875957A (en) | 1975-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |